From 2867bbcacc0718d6fdac8afd8d881c88f35ada89 Mon Sep 17 00:00:00 2001
From: Boris Chiou <boris.chiou@gmail.com>
Date: Wed, 12 Apr 2017 16:27:59 +0800
Subject: [PATCH] Bug 1343753 - Add Servo_Animationvalues_IsInterpolable.

MozReview-Commit-ID: gaj9lJ7NYV
---
 components/style/gecko_bindings/bindings.rs | 7 +++++++
 ports/geckolib/glue.rs                      | 9 +++++++++
 2 files changed, 16 insertions(+)

diff --git a/components/style/gecko_bindings/bindings.rs b/components/style/gecko_bindings/bindings.rs
index e0c8de4ac40..6c118e92bdc 100644
--- a/components/style/gecko_bindings/bindings.rs
+++ b/components/style/gecko_bindings/bindings.rs
@@ -1692,6 +1692,13 @@ extern "C" {
                                              progress: f64)
      -> RawServoAnimationValueStrong;
 }
+extern "C" {
+    pub fn Servo_AnimationValues_IsInterpolable(from:
+                                                    RawServoAnimationValueBorrowed,
+                                                to:
+                                                    RawServoAnimationValueBorrowed)
+     -> bool;
+}
 extern "C" {
     pub fn Servo_AnimationValue_Serialize(value:
                                               RawServoAnimationValueBorrowed,
diff --git a/ports/geckolib/glue.rs b/ports/geckolib/glue.rs
index c78be1a196c..bb7267cd175 100644
--- a/ports/geckolib/glue.rs
+++ b/ports/geckolib/glue.rs
@@ -256,6 +256,15 @@ pub extern "C" fn Servo_AnimationValues_Interpolate(from: RawServoAnimationValue
     }
 }
 
+#[no_mangle]
+pub extern "C" fn Servo_AnimationValues_IsInterpolable(from: RawServoAnimationValueBorrowed,
+                                                       to: RawServoAnimationValueBorrowed)
+                                                       -> bool {
+    let from_value = AnimationValue::as_arc(&from);
+    let to_value = AnimationValue::as_arc(&to);
+    from_value.interpolate(to_value, 0.5).is_ok()
+}
+
 #[no_mangle]
 pub extern "C" fn Servo_AnimationValueMap_Push(value_map: RawServoAnimationValueMapBorrowed,
                                                property: nsCSSPropertyID,